poem_str = "\t\n登鹳雀楼 \n 王之涣\n\t \n白日依山尽 \t 黄河入海流 \t\n 欲穷千里目\t\n 更上一层楼"
print(poem_str)

#拆分字符串
poem_list = poem_str.split()
print(poem_list)
#合并字符串
result = "   ".join(poem_list)
print(result)